Rowland Tank No 1 Dam is an earth dam located in McMullen County, Texas, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 960 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Rowland Tank No 1 Dam
The primary purpose of Rowland Tank No 1 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Jessie May (private). It impounds the Tr-ygnacio Creek.
The dam stands 16 feet tall and stretches 960 feet across, creates a reservoir covering 32 acres, and has a maximum storage capacity of 500 acre-feet. Completed in 1968, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Texas |
| County | McMullen |
| River/Stream | Tr-ygnacio Creek |
| Coordinates | 28.07816, -98.68642 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 960 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Normal Storage | 141 acre-ft |
| Surface Area | 32 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Jessie May |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX03024 |
| Federal ID | TX03024 |
| More Info | State Dam Safety Program |